R：使用rollapply对列组进行求和的问题(R: Problems using rollapply to sum groups of columns)

 我应该是一个简单的问题，但我对R很新，所以它让我感到难过。 
 
 我有一系列25列代表行为实验中的试验。 我想使用roll apply来汇总前5列，然后是6-10,11-15，依此类推，这样我最终得到一个包含输出的新的5列数据框（类似于5列示例）下面）。 真的，重点是能够快速更改“bin大小”，以便我可以决定哪种“分辨率”最适合数据。 最后我不会只是总结，但我认为这个答案将足以让我滚动。 
 
INPUT:
Col1   Col2   Col3   Col4   Col5
  1      1      1      1      1
  2      2      2      2      2

DESIRED OUTPUT:
Col1
 5
 10

I have what should be a simple question, but I'm very new to R so it's stumping me.
 
I have a series of 25 columns representing trials in a behavioral experiment. I would like to use roll apply to sum the first 5 columns, then 6-10, 11-15, and so on, so that I end up with a new, 5 column data frame containing the output (similar to the 5 column sample below). Really, the point is to be able to rapidly change the "bin size" so that I can make decisions about what "resolution" best suits the data. In the end I wont just be summing, but I think this answer would be plenty to get me rolling.
 
INPUT:
Col1   Col2   Col3   Col4   Col5
  1      1      1      1      1
  2      2      2      2      2

DESIRED OUTPUT:
Col1
 5
 10

原文：https://stackoverflow.com/questions/17243565